Duplicating machine



SePt- 20, 1938' v A. MARcHEv ET AL 2,130,962 v DUPLIGATING MACHINE Filed April l, 1957 ll Sheets-Sheet 1 Slept- 20, 1938' A. MARcHEv ET AL 2,130,962

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DUPLICATING MACHINE A Filed April l, 1957 ll Sheets-Sheet 6 Sept. `20, 1938.

A. MARcHEv E1- AL 2,130,962

DUPLICATING MACHINE Filed April l, 1937 I 1l Sheets-Sheet '7 Sept. 20, 1938. A. MARcHEv r AL 2,130,962

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' DUPLIGATING MACHINE Filed April l, 1937 ll Sheets-Sheet. 11

NN KWN Patented Sept. 20, 1938 UNITED STATES PATENT oFFlcE DUPLICATING MACHINE Application April 1, 1937, Serial No. 134,320

20 Claims.

'Fne invention relates to duplicating machines and is particularly adapted to be embodied in duplicating machines of the hectograph type but the invention is limited to this use only to the extent indicated in the appended claims.

One form of the invention is embodied in a duplicating machine of the hectograph type, the machine preferably comprising a bed plate over which a hectograph band is trained and over which a carriage is mounted for reciprocation. The carriage is provided 'with platen and pressure rolls which co-operate to apply copy sheets to the hectograph band when the carriage is reciprocated. The platen roller is movably mounted and is controlled by a handle which is also employed to reciprocate the carriage.

In a preferred embodiment of the invention, means is provided for holding the carriage in a single position each time the platen roller is y lowered to apply a copy sheet to the hectograph band. Means is also provided for advancing the carriage in a step by step manner each time the platen roller is lowered and raised. With this construction, a copy may be made on a copy sheet of one or two lines of printing from the surface of the hectograph band and then the next line or two may be copied on the succeeding copy sheet. A duplicating machine embodying the invention is advantageous when data is to be copied from a payroll sheet or vthe like. Thus the data relating to a single employee, such as the hours he has worked and the amount of pay that is due him, may be copied onto a pay envelope.

Other forms of the invention are embodied in duplicating machines which permit two or more copies to be made of each line of printing, or the like, of the data on the hectograph band before the carriage and platen roller are advanced in a step by step manner.

Other objects and advantages will become apparent as the following vdetailed description progresses, reference being had to the accompanying drawings wherein- Fig. 1 is a plan of a duplicating machine which embodies the invention.

Fig. 2 is a side elevation of the improved du plicating machine.

Fig. 3 is an enlarged fragmentary side elevation of the improved machine.

Fig. 3A is a side elevation of a locking lever which forms part of the mechanism shown in Fig. 3.

Fig. 3B is a side elevation of another lever (Cl. lOl-133) which forms part of the mechanism shown in Fig. 3.

Fig. 3C is a side elevation of still another lever which forms part of the mechanism shown in Fig. 3.

Fig. 4 is a side elevation of the mechanism shown in Fig. 3, certain parts being shown in changed positions.

Fig. 5 is a section taken on line 5-5 of Fig. 3.

Fig. 6 is a section taken on line 6 8 of Fig. 3.

Fig. 7 is fragmentary view of the mechanism shown in Fig. 3, the view being taken looking from the left of Fig. 3.

Fig. 8 is a section taken on line 8 8 of Fig. '7.

Fig. 9 is a fragmentary side elevation of the mechanism shown in Fig. 3, certain parts being shown in changed positions.

Fig. l0 is a section taken on line IIB- i0 of Fig. 9.

Fig. 11 is a side elevation of a ratchet wheel and pawls which form part of the improved duplicating machine.

Fig. 12 is an enlarged section taken on line |2-l2 of Fig. 1.

Fig. 13 is a fragmentary section taken on the same line as Fig. 12 but showing certain parts in changed positions.

Fig. 14 is a View of a payroll sheet which may be utilized in the improved duplicating machine.

Fig. 15 is a View of a pay envelope which may be employed in connection with the payroll sheet shown in connection with Fig. 14.

Fig. 16 is a fragmentary side elevation, partly broken away, of mechanism which embodies another form of the invention.

Fig. 17 is a view of the mechanism shown in Fig. 16, certain parts of the mechanism being shown in changed positions.

Fig. 18 is a section taken on line |8-l8 of Fig. 16.

Fig. 19 is a side elevation of a ratchet wheel and pawl forming part of the mechanism shown in Fig. 16.

Fig. 20 is a side elevation of another ratchet Wheel and its (so-operating pawls, which ratchet wheel and co-operating pawls form a part of the mechanism shown in Fig. 16.

Fig. 21 is a fragmentary side elevation, partly broken away, of duplicating mechanism which embodies still another form of the invention.

Fig. 22 is a section taken on line 22-22 of Fig. 21.

Fig. 23 is a side elevation of a ratchet and its co-operating pawl, which ratchet and pawl form part of the mechanism shown in Fig. 21.

Fig. 24 is a side elevation of a ratchet and its co-operating pawl, which ratchet and pawl form part of the mechanism shown in Fig. 21.

' Fig. 25 is a side elevation of still another ratchet and its co-operating pawl, which ratchet and pawl also form part of the mechanism shown in Fig. 21.

Referring for the present to Figs. 1 to 14, inclusive, wherein a preferred embodiment of the invention is illustrated, the reference character 25 designates generally the cabinet upon which the improved duplicating machine is mounted, the improved duplicating machine being designated generally by the reference character 26 (Fig, 2). The duplicating machine 25, with the exception of certain novel mechanism added thereto, is substantially identical with the duplicating machine shown and described in U. S..

Letters Patent No. 2,007,473, granted July 9, 1935. to Alfred Marchev et al. The duplicating machine 25 comprisesr a frame 2l preferably p rovided with resilient pads 28 which rest uponthe top surface of the cabinet 25. The` frame 21 comprises hollow sheet metal side frames 29 to which the resilient pads 28 are xed. (Figs, 1, 2, 5 and 6.) The side frames also comprise tubular sheet metal members 30 provided with enlarged ends 3i which are secured to the upper surfaces of the side frame members 29. Intermediate their ends, the frame members 30 are spaced from the frame members 29 to provide slots 32 for a purpose which will presently appear.

The improved duplicating machine shown in Figs. l to 13, inclusive, is of the hectograph type and is provided with a gelatin band 35 which has its ends secured to spindles (not shown). Means including a handle 35 is provided lfor winding and rewinding the gelatin band from one spindle to the other. This means is preferably identical with the similar means shown in U. S. Letters Patent No. 2,007,473 and as the details of the winding means do not form a part of the present invention, it will not be necessary to describe them in this instance. The gelatin band 35 passes over a bed plate 38 (Figs. 12 and 13). When the improved duplicating machine is to be used, the master sheet is iirst placed against the gelatinized surface of the band 35 until the data on the master sheet is duplicated on the gelatinized surface. Copy sheets are then applied to the impression on the gelatin and a plurality of such sheets may be applied to the gelatin to obtain copies of the master sheet.

Means is provided for applying the copy sheets to the gelatin band 35. This means preferably comprises a platen roller 40 which co-operates with a pressure roller 5l (Figs. 12 and 13). The platen roller 4i) is fixed to a shaft 42 which has its ends journalled in a yoke 53 fixed to a shaft all which may be oscillated by a lever 55 provided with a handle' (i6. The ends of the shaft i4 are journalled in the end walls 48 of a carriage member i9 which extends over the bed plate 33 transversely thereof. The carriage member i9 is detachably secured to a second carriage member 52 by means comprising latch devices 53. The carriage member 52 is preferably in the form of a bent bar and extends through the slots 32 and underneath the bed plate 38 (Figs. 2, 3, 5 and .6) As best illustrated in Figs. 5 and 6, bars 55 project upwardly from the carriage member 52 into the tubular frame members 35, the bars 55 being secured to the frame member 52 and being provided with raceways 56 for, ball bearings 5T which are mounted in fabricated U-shaped bars 58 disposed within and fixed to the tubular frame members 30. The ball bearings 57 are journalled in depressions 60 formed in the bars 58 and are retained in these depressions by ball bearing retainers 6| formed of sheet metal.

The carriage members 49 and 52, the latch devices 53 for securing the carriage member 5S to the carriage member 52 and the ball bearing construction illustrated in Figs. 5 and 6 are substantially identical with the same parts illustrated in said U. S. Letters Patent No. 2,007,473 and have substantially the same functions. The ball bearings 5! slidably journal the carriage member 52 so that it may be reciprocated longitudinally of the bed plate 38. The latch members may be manipulated so that the carriage member 59 maybe detached quickly from the carriage member 52 and removed bodily therefrom. The carriage member 49 may be returned and xed to the carriage member 52 with equal ease after it has been removed therefrom. One advantage of this'construction is that it enables the operator to insert a new gelatin band 35 in the machine with little effort. Y

Referring now to Figs. l2 and 13 which illustrate the manner in which copy sheets are applied to the gelatin band 35, the reference character 63 designates a sheet metal guide xed to the carriage member 49, which guide member 53 is adapted to guide Vcopy sheets 35 between the platen roller 50 and the pressure roller il when they are in the positions wherein they are illustrated in Fig. 12 so that the lower end of each copy sheet may come to rest in a margin bar 55 to obtain proper registry with the impression on the gelatin band 35 whenthe copy sheet is subsequently applied thereto. When the handle 46 is displaced from the position wherein it is shown in Fig. 12 to the position wherein it is shown in Fig. 13, the platen roller 50 applies the lower end of the copy sheet 64 to the gelatin band 35. The pressure roller Il! co-operates with the platen roller 40 in this initial operation as is more fully explained in said U. S. Letters Patent No. 2,007,473. It may be mentioned that if the carriage comprising the members l5 and 52 is then free to be displaced to the right (Fig. 13) the platen roller d and the pressure roller 5l will cooperate to apply the copy sheet 55 over the full impression made upon the gelatin band 35, it being the common practice, however, to leave the last end of a copy sheet between the rollers le and 4L so that when the carriage comprising the members 49 and 52 is returned to the position wherein it is shown in Fig. 13, the rollers i5 and 4! will pull the copy sheet from the somewhat tacky surface of the gelatin band. t may be mentioned that the platen roller i5 is preferably made from sponge rubber.

The margin bar 65 has its ends secured to plates 5l' pivoted by pins 68 to the end walls i3 of the carriage member 49. Each of the plates 57' is provided with a notch ,59 engageable by a pin 'E5 projecting from one of the arms of the yoke 133. Pins 'l2 projecting inwardly from the end walls i8 of the carriage member' 19 are engageable by the upper ends of the plates 31. A spring 73 tends to rotate the plates 5l' in a counter-clockwise direction (Figs. 12 and 13). One end of the spring 'i3 is attached to the upper end of one of the plates El, the other end of the spring being attached to a ring 'l5 mounted on the shaft 44. When the handle 56 is in the position wherein it is shown in Fig 12 so that the platen roller and the pressure roller il are members 38 and 29.

spaced from each other to permit a copy sheet 64 to be fed between them, the margin bar 651s in the position wherein it is shown in Fig. l2, the margin bar 65 being held in this position by the spring 13. It will be noted that one oi the plates 61 then rests against the stop pin 12. However, when the handle 46 is displaced from the position wherein it is shown in Fig. 12 to the position wherein it is sho-wn in Fig. 13, the pins 18 on the yoke 43 engage the notches 69 or the plates 61 and displace the plates 61 and the margin bar 65 in a clockwise direction (Figs. 12 and 13) against the action of the spring 13 so that the margin bar assumes the position wherein it is shown in Fig. 13.

Referring now to Figs. 1, 2, 9 and 10 it will be noted that a stop member 88 is pivoted by a pin 8| to a bracket 82 which is fixed to one of the side frames 29. The stop member is engageable with a pin 83 for a purpose which will presently appear. At the back end of the frame, a rubber bumper 84 is provided. The bumper 84 is secured to the forward end of a bracket 85. Projecting through and journalled in the back end of the bracket 85 is a pin 81 which also projects through a plate 86 formed with shoulders 88 and 89. 'I'he shoulder 88 rests against the adjacent frame member 38 and the shoulder 89 rests against the adjacent frame member 29, a portion of the plate 86 being disposed in the slot 32 between these two frame members. The inner end of the pin 81 is screw threaded into a block 98 which also abuts against the adjacent frame At its outer end, the pin 81 is provided with a knob 9| which is fixed to it and may be manipulated to draw` the plate 86 and the block 98 toward each other so that they will frictionally engage the adjacent frame members 29 and 38 with sufficient force to hold the bracket member 85 in any one of a plurality of adjusted positions. Oi course, the knob 9| may be manipulated to release the bracket 85 when it is desired to move it to a new position. Fixed to the forward end of the bracket 85 is a stop bar 93 which is also engageable with the pin 83 for a purpose hereinafter set forth.

As best shown in Figs. 2, 3, 4 and 7, a toothed bar 95 is secured to one of the side frames 29 by screws 86. At its forward end, the bar 95 is provided with a V-shaped notch 91' and along the remainder of the bar in back of the V-shaped notch 91, a plurality of substantially rectangular teeth 98 are provided, which teeth 98 provide notches 99 between them. At its forward end the bar 95 is provided with a bevelled surface |88 for a purpose which will also presently appear.

As stated above, it is common practice in a duplicating machine of the character described to reciprocate the carriage over the bed plate to apply copy sheets to the gelatin band, a copy sheet being printed with each recprocation of the carriage. In the improved machine illustrated in Figs. l to 13, inclusive, the carriage 49-52 may be operated in this manner as hereinafter described but it may also be operated in a step by step manner during its printing stroke so that a plurality of copy sheets, or the equivalent, may be employed during each printing stroke of the carriage. With such construction, one or more lines of printing, or the equivalent, may be copied on a copy sheet for each step of the printing stroke. Thus, for example, with the carriage 49-52 in the position wherein it is shown in Figs. 2 and 3 but the handle 46 in the position wherein it is shown in Fig. 12, a copy Awhich co-operates with the ratchet I I3.

sheet may be inserted in the manner described above and the handle 46 may be displaced from the position wherein it is shown in Fig. 12 to the position wherein it is shown in Fig. 13 so that the forward portion of the copy sheet will be pressed against the gelatin band 35 to obtain a copy of one or more lines of printing on the band. Then the handle 46 may be returned to the position wherein it is shown in Fig. 12 and the copy sheet may be removed from the carriage but meanwhile the carriage 49-52 has moved to the right (Fig. 3) a distance equal to the spacing of the teeth 88. When the next copy sheet is inserted in the carriage 49-52, the lower or forward end of such copy sheet will copy lines of printing spaced from the lines of printing which were copied by the iirst copy sheet a distance equal to the spacing between the teeth 98. The construction of the mechanism for obtaining this cycle of operations is as follows:

Referring to Fig. 7 it will be noted that the lever 45, to which the handle 46 is attached, is provided with a lug |85 which is engageable with one end of a lever |86 which is pivoted intermediate its ends on the carriage member 49 by a bolt |81. That end of the lever |86 disposed in the path of the lug |85 is hinged to the main portion of the lever as shown at |08 (Figs. 7 and 8). The hinged end of the lever is designated by the reference character ||8. As indicated in dotted lines in Fig. 8, the hinged end ||8 of the lever |86 may be swung out of the path of the lug |85. The other end of the lever |86 is engageable with two levers which are identical in construction and are pivoted upon a pin ||2 (Fig. 5). The levers are spaced from each other by a ratchet ||3 and are secured to each other by a pin ||4 through the free ends thereof, the pin i i4 being adapted to journal a pawl ||5 As illustrated in Figs. 3 and 4, when the lever |86 is displaced in a counter-clockwise direction (Fig. 7) by the lug |85, the right hand end (Fig. 7) of the lever |86 will engage the levers |I| and displace them in a clockwise direction (Figs. 3 and 4) against the action of a spring ||6. The levers lli will be displaced from the position wherein they are shown in Fig. 3 to the position wherein they are shown in Fig. 4. One end of the spring ||6 is xed to a pin ||1 projecting from one of the levers the other ends of the spring ||6 being fixed to a pin ||8 which projects from a bracket |28 secured to the carriage member 52 by screws |2| (Fig. 3).

The pin ||2 has one end screw-threaded into a block |25 which is secured to the carriage member 52 (Figs. 3 and 5). The block |25 ts snugly in the recess |26 formed in the carriage member 49. It may be mentioned that there is a block |25 at each end of the carriage member 52 and that each of the blocks |25 t snugly in a similarly shaped recess |26 formed in the carriage member 49. In other words, when the carriage member 49 is attached to the carriage member 52 through manipulation of the latch devices 53, the recesses |26 receive the blocks |25 and correctly position the carriage member 49 upon the carriage member 52.

When the levers are displaced from the position wherein they are shown in Fig. 3 to the position wherein they are shown in Fig. 4, the pawl ||5 displaces the ratchet |3 in a clockwise direction (Figs. 3 and 4) which, during such angular displacement, displaces a pawl |38 from the position wherein shown in Fig. 3 to the position |41 is disposed in the V-shaped slot 91.

wherein it rests in the next notch between the teeth of the ratchet wheel ||3 but it passes over one of the teeth of the ratchet wheel as shown in Fig. 4. The pawl .|30 is pivoted by a pin |3| to one end of the carriage member 52. Mounted on the pin |3| between the pawl |30 and a head provided on the outer end of the pin is a plate |33 from which a pin |34 projects. One end of a spring |35 isy fixed to the pin |34, the other end of the spring |35 being fixed to a pin |36 which projects from a lever |31. The lever |31 is shown by itself in Fig. 3B and is pivoted upon the pin H2. `It will be noted that the lever |31 is pivoted intermediate its ends and at its upper end is provided with two laterally extending lugs |39 and |40 which are engageable by the levers When` the mechanism is in the condition wherein it is illustrated in Fig; 3, the free ends of the levers engage thelug |40 but when the levers are displaced in a counter-clockwise direction (Figs. 3 and 4) by the lever |06, the levers leave the lug |40 and then engage the lug |39 to displace the lever |31 to the position wherein it is illustrated in Fig. 4. It will be noted that there is' lost motion asI far as the lever |31 is con-cerned as the levers travel an appreciable distance after they leave the lug |40, before they engage the lug |39 during their displacement of the lever |31.

Pivoted to the lower end of the lever |31 by a pin is a lever |46 which, at one end, has a V-shaped nose |41. In Fig. 3, the V-shaped nose The other end of the lever |46 is designated by the referencecharacter |48 and is engageable by the pin 83. The pin 83. projects from the free end of a lever |50 which ispivoted upon a pin |5| projecting from the carriage member 52 (Figs. 3, 4 and 6).

When the pawl |30 is vdisplaced into the position wherein it is shown in Fig. 4, it pushes downwardly upon a lug r|55 projecting from a lever |56 which is pivoted intermediate Yits ends by a pin |51 projecting from the bracket |20. A spring |58 has one of its ends secured to the lever |56, the other end of the spring |53 being `iixed to one of a pair of bolts |59 which secure one of the blocks |25 to the carriage member 52. The other end of the lever |56 is provided with a laterally extending lug |60 which is engageable with the notches 99 provided in the bar 95 (Figs. 3 and l4). A leaf spring |62 fixed to the bracket |29 has its free end engaging the left hand end (Fig. 3), of the lever |46, the spring |62 yieldingly urging the lever |46 in a counterclockwise direction (Figs. 3 and 4).

When the lever |50 carrying the pin 33 is displaced irom the position wherein it is shown in Figs. 3 and 4 to the position wherein it is shown in Fig. 9, the levers |45 and |56 are engaged by and are displaced angularly in a clockwise direction (Figs. 3, 4 and 9) against the action of the springs |58 and |62. When the levers |46 and |56 are in the positions wherein they are shown in Fig. 9,-the lug |50 of the lever |56 is held in a position wherein it cannot engage the teeth 98 or the slots 99 and the V-shaped nose |41 oi the lever |46 cannot engage the V-shaped notch 91 or the'notches 99. The lever |510 may be displaced manually from the position wherein it is shown in Figs. 3 and 4 to the position wherein it is shown in Fig. 9 and it may be returned manually. Also, when the carriage 49-52 is moved to the right` (Fig. 2) a sufhcient distance, the stop bar 93 will engage the pin 83 and displace the lever |50 from the position wherein it is shown in Figs..3 and 4 to the position wherein it is shown in Fig. 9. It will be noted that angular displacement of the lever |50 in a clockwise direction (Fig. 9) is limited by a stop pin projecting from the carriage member 52. When the carriage 49-52 is moved forwardly on the improved machine a suiicient distance, the pin 83 will strike the bent bar 80 and Will displace the lever |50 in a counterclookwise direction (Figs. 2 and 9) so that the levers |46 and |59 will be displaced angularly in a counterclockwise direction (Figs. 3 and 4) by the springs |62 and |58, respectively. In other words, the levers |46 and |56 are then released to function automatically in a manner hereinafter described.

'I'he operation of the above described mechanisrn will be explained in connection with Figs. 14 and l5. In Fig. 14 the reference character |10 designates generally a master sheet which is a sheet of paper upon which payroll data has been printed with hectograph ink. Therpayroll has suitable data printed thereon to identify the period of time covered by it, etc. In addition, it is provided with a plurality of vertically extending columns which are divided by horizontally extending lines |1| into horizontally extending columns. In each horizontally extending column, suitable data with respect to each individual employee and the amount he is to receive as wages or salary for the period of the payroll is printed in hectograph ink. It will be noted that a relatively large number of employees may be identiiied on the master sheet |10 and that the data with respect to their wages or salaries, etc., may also be printed on the master sheet.

The master sheet |10 may be applied directly to the gelatin band 35 without using the platen roller 40 and the pressure roller 4| but is preferably applied to the gelatin band by placing it in the guide 63 and permitting its forward end to come to rest against the margin bar 65. The lever |50 is then in the position wherein it is shown in Fig. l2. I'he handle 46 is then brought into the position wherein it is shown in Fig. i3 so that the forward end of the masterl sheet is applied to the gelatin band and then the carriage 49-52 is displaced to the right (Fig. 130 until all of the data thereon relating to the employees has been brought into contact with the gelatin band. After the master sheet has remained in contact with the gelatin band for some time it is stripped therefrom and the envelopes 54 can be applied thereto to duplicate data thereon. It may be mentioned that in the embodiment of the invention illustrated in Figs. l to 13, inclusive, the master sheet |15 is inserted between the rollers 40 and 4| with its upper end downwards so that it engages the margin bar 05. Of course, the master sheet is placed in the carriage 49-52 with its printed face downward so that this face will contact the gelatin band. When the master sheet is to be applied to the hectograph band 35, the bent bar 89 may be swung into the dotted position wherein it is shown in Fig. 2 and the carriage 49-52 may be moved as far as possible toward the left hand end (Fig. 2) of the frame. The bar 95 is iixed to the frame in such a position that proper registry will be obtained when the carriage iQ- 522 is returned to the position wherein it is shown in Fig. 2 and theV rst envelope 64 is fed into the carriage.

One purpose ottheximproved mechanism is to provide means to take a separate impression or copy of the data relating to each employee. These separate impressions may lbe taken upon slips of paper or pay envelopes, etc. If it is assumed that the copy sheets 64 discussed above are pay envelopes, it will be readily understood that the carriage 49-52 may be brought into the position wherein it is illustrated in Fig. 3 but with the handle 46 in its upright position wherein it is shown in Fig. 4 so that the platen roller 40 and the pressure roller 4| will occupy the relative positions wherein they .are shown in Fig. 12. The nose |41 will not then rest in the notch 91 as shown in Fig. 3, but will rest upon the bar 95 to the left (Fig. 3) of the notch 91 although the lug |60 will engage the first notch 99 as shown in Fig. 3. A pay envelope 64 may be inserted between the platen roller 40 and the pressure roller 4| in the manner illustrated in Fig. 12. The handle 46 is then displaced in a clockwise direction (Figs. 12 and 13) so that the platen roller 40 and the pressure roller 4| cio-operate to press a portion of the pay envelope against the gelatin band. The registry of the pay envelope with respect to the data relating to the iirst ernplo-yee listed on the master sheet will be such that it will be printed upon the pay envelope. This data may include a number identifying the employee, the employees name, the amount of his salary, etc., as indicated in Fig. 15 wherein a pay envelope 64 is shown.

Fig. 3 illustrates the position or" the carriage 4952 when the rst duplicating operation is taking place. However, when the handle 46 is displaced in a counter-clockwise direction (Fig. 3) to bring it into the position wherein it is shown in Fig. 4 so that the platen roller 40 and the pressure roller 4| are in the positions wherein they are shown in Fig. 12, the carriage 49-52 is advanced a distance equal to the spacing or pitch of the teeth 98. Thus, in Fig. 4, it will be noted that the carriage 49--52 has advanced a distance which brings the lug |69 into registry with the second slot 99 from the left instead of the rst slot as shown in Fig. 3. This movement is accomplished as follows: When the handle 46 is first displaced into the position wherein it is shown in Fig. 3 for the first duplicating operation the lever |46 is displaced to the right (Fig. 3) until the nose |41 drops in the notch 91 by the action of the spring |62. This bodily displacement of the lever |46 to the right (Fig. 3) is accomplished by the spring |35 when the handle 46 is displaced into the position wherein it is shown in Fig. 3 as the right hand end (Fig. 7) of the lever |06` moves downwardly under the action of the spring 6 and permits the lever |31 to be displaced angularly in a counter-clockwise direction (Fig. 3) .by the spring |35 so that the lever |46 brings its nose |41 to the slot 91. Now after the initial printing operation has taken place and. the handle 46 is moved from the position wherein it is shown in Fig. 3 to the position wherein it is shown in Fig. 4, the lug |05 on the lever 45 engages the hinged end ||0 of the lever |95` and displaces the lever |06 in a counterclockwise direction (Fig. 7) so that the other end of the lever displaces the levers in a clockwise direction (Figs. 3 and 4) and the pawl ||5 rotates the ratchet |3 to the position wherein it is shown in Fig. 4 so that the free end of the pawl |39 passes over the top of one of the teeth of the ratchet I |3 as illustrated in Fig. 4. Meanwl'L'le, the levers have engaged the lug |39 of the lever |31 and have displaced the lever |31 angularly to the position wherein it is shown in Fig. 4. The lever |46 which is pivoted to the bottom end of the lever |31 remains in engagement with the V-shaped notch 91 and therefore the pin |45 which pivots the lever |46 to the lever |31 serves as a fulcrum point and the carriage 49-52 and the mechanism carried by it are displaced from the position wherein they are I shown in Fig. 3 to the position wherein they are shown in Fig. 4 so that the lug |60 of the lever |56 comes into registry with the second slot 99 from the left of the bar 95. However, it will be readily understood that to accomplish this movement of the carriage S9-52, it is rst necessary to withdraw the lug |60 from the first slot 99 from the left of the bar 95. This is done by the pawl |30 which immediately upon movement of the ratchet wheel H3, as described above, moves in a counter-clockwise direction (Figs. 3 and 4) and displaces' the lug |55 and the lever |56 in a clockwise direction (Fig. 4) to withdraw the lug |60 from the slot 99 engaged by the lug |60 in Fig. 3. The lost motion between the time the levers leave the lug |40 and engage the lug |39 of the lever |31 permits the disengagement of the lug |60 from the first slot 99 from the left of the bar 95 before the carriage 49-52 beginsto move to the right (Fig. 3). When the carriage 49-52 is moved to the right (Figs. 3 and 4) from the position wherein it is shown in Fig. 3 to the position wherein it is shown in Fig. 4, the lever |56 moves bodily with the carriage as it is pivoted on the pin |51 which is xed with respect to the carriage. Of course, as soon as the pawl |39 has passed over the tooth with which it is shown in engagement in Fig. 4, it drops into the succeeding notch of the ratchet wheel |3 and the lever |56 is displaced by the spring |58 so that the lug |60 drops into the second slot or notch 99 from the left hand end (Fig. 4) of the bar 95.

The next pay envelope 64 may then be inserted after which the handle 46 may be displaced from the position wherein it is shown in Fig. 4 to the position wherein it is shown in Fig. 3, to copy the next line of data from the hectograph band 35. Such movement of the handle 46 lifts the lug |95 so that the lever |06 does not prevent counterclockwise movement (Fig. 4) of the levers The spring |35 then displaces the lever |31 in a counter-clockwise direction (Fig. 4) and it pulls the lever |46 along with it so that the V-shaped nose |41 of the lever |46 falls into the first slot 99 from the left (Fig. 4) of the bar 95. Meanwhile, the spring ||6 has retracted the levers to the position wherein they are shown in Fig. 3 with respect to the lever |31. It will be noted that the V-shaped nose |41 does not prevent the lever |46 from being pulled along to the right (Fig. 4) although it will prevent the carriage 49-52 from being urged bodily to the left (Fig. 4) as long as the nose is engaged with the V-shaped notch 91 or one of the slots 99. Of course, when the lug |69 oi the lever |56 is engaged with one of the slots 99, the carriage 49-52 is held against displacement in either direction.

Now if it is assumed that the second envelope 64 has had the proper data copied upon it and that it is in the position wherein it is shown in Fig. 13, the next step is to displace the lever 46 in a counter-clockwise direction (Figs. 4 and 13) whereupon the cycle of operations described above when it was assumed that the lever 46 was moved from the position wherein it is shown in Fig. 3 to the position wherein it is shown in Fig. 4 is repeated and the carriage moves to the right (FigA) a distance equal to the spacing or pitch of the teeth 98. Of course, the platen roller Y4l) then moves away from the pressure roller 4| and the pay envelope 64 may be withdrawn to be replaced by another pay envelope upon which will be copied data with respect to the next employee on the payroll list. The operations described above in connection with the printing of the rst pay envelope are then duplicated for the printing of the third pay envelope and are repeated as often as necessary until all of the data on the payroll sheet have been copied, it being understood that after each cycle of operations with respect to a single pay envelope 64, the carriage 45-52 moves bodily to the right (Fig. 4) a distance equal to the spacing or pitch of the teeth 98.

It will be readily understood that the carriage 49--52 may be returned at any time to the position shown in Fig. 3 if the lever |50 is displaced manually in a clockwise direction (Fig. 4) to bring the pin 83 into a position wherein it will hold the levers |56 and |46 in the positions wherein they are shown in Fig. 9. After the carriage 49-52 has been brought into the position wherein it is shown in Fig. 3, the lever |50 may be returned to the position wherein it is shown in Fig. 3 so that the lever |56 will occupy the position wherein it is shown in Fig. 3. As described above, the nose |41 of the lever |46 will Vthen rest on the bar 95 to the left (Fig. 3) of the V-shaped notch 91. .However, when the carriage t9- '52 has reached and passed the last eiective slot 99 in the bar 95 toward the right in saidv Fig. 3, the carriage may be displaced tothe right (Fig. 2) so that the stop bar 93 will displace the lever E56 and the pin 83 toward the left in said figure as described above to lift the levers |46 and |56. The carriage may then be moved rapidly to the forward end of the machineto a point some little distance to the left of the position as shown in Fig. 3 so that the bar 86 will displace the lever |50 and the pin 83 again toward the right in said Figs. 2 and 3 to allow the holding ends of the levers |46 and |56 to drop. Then when the carriage is returned to the position wherein it is shown in Fig. 3, the lug |65 will engage the iirst slot 99 and the nose |41 will rest on the bar 95 to the left (Fig. 3) of the notch 91, whereupon the mechanism may be manipulated as described above.

As best shown in Fig. 5, the mechanism comprising the levers |31, |46 and |56 and the mechanism associated with them is preferably concealed behind a plate 200 which has a slot (not shown) in which the pin 83 may oscillate. The plate 255 is fixed to the pins |51 and |59. The plate 206 is not shown in Figs. 2, 3 and 4.

It may be mentioned that the reason for making the notch 91 V-shaped is to prevent the lug B66 from dropping into it. This facilitates the task of bringing the carriage 49-52 into the position wherein it is shown in Fig. 3.

From the above description of the mechanism shown in Figs. l to 13, inclusive, it will be understood that a single impression is taken of the data Vrelating to any particular employee with each oscillation of the handle 46 and that the carriage then shifts to bring it into registry with the data for the next employee on the list. Of course, the entire set of operations may be repeated to obtain additional copy sheets or pay envelopes having the same data thereon;

of the data relating to a single employee before the carriage moves to the next position.

Referring now to Figs. 16 to '20, inclusive, wherein duplicating apparatus embodying another form of the invention is shown, the reference character 49h designates a carriage, which, with the exception of some minor modifications, is identical with the carriage 49-52 described above. Journalled in the carriage 49h is a shaft 44h to which a yoke 43buis xed, the yoke 43D being provided with a platen roller 4Gb and being formed integral with a lever 45h provided with a handle 46D. A pressure roller 4|bjournalled in the carriage 491i cooperates with the platen roller 46h in the same manner as the pressure roller 4| described above co-operates with the pressure roller 4Q. The lever 45D is provided with a lug |05b. The yoke 43h, the handle 46h and the lug i651) have the same functions as the corresponding parts described in connection with Figs. 1 to 13, inclusive.

The lug |6511 will displace a lever |6617 when the handle 45h is displaced from the position wherein it is shown in Fig. 16 to the position wherein it is shown in Fig. 1'1. The lever m61) is preferably identical in construction with the lever |66 described above and has the same function, the lever |661) being pivoted to the carriage 49h. The carriage 49h comprises a carriage member 52h corresponding to the carriage member 52 described above and the carriage member 52h is provided with blocks |2513 corresponding to the blocks 25 described above. The carriage member 4gb also comprises a carriage member 49a which corresponds to the carriage member 49 above. The carriage member 49a is secured detachably to the carriage member 52h by latch devices 53h preferably identical with the latch devices 53 described above.

Projecting from the carriage member 52h is a pin H21) and journalled onthe pin H212 are yratchets l|3b and H3C, the ratchets H31) and |30 being constrained to rotate withy each other. Levers lllb pivoted upon the pin H25, with the ratchets |||3b and |i3c between them, have their free ends secured to each other by a pin M412. The levers |||b correspond to the levers lll described above. Pivoted upon the pin i |4b'is a pawl H51) which corresponds to the pawlY ||5 described above, the pawl l|5 being engageable with the teeth of the ratchet |30. The teeth of the ratchets ||3b and H3C are best shown in Figs. 20 and 19, respectively, and it will be noted that the ratchet ||3c is provided with twice as many teeth as the ratchet |I3b. A spring llb l stantially identical with the bracket |25 described above and is secured to the'frame member 52h. It will be noted that the spring ||6b tends to rotate the levers Mib in a counter-clockwise direction (Figs. 16 and 17). It Will be understood that when the lever 4619 is displaced from the position wherein it is shown in Fig. V16 to the position wherein it is shown in Fig. 17; the lug |65b will displace the lever HiiibV so that it, in turn, will rotate the leversV lllb in a clockwise direction (Fig. 16). The construction is such that the vangular distance through which the levers i lib are displaced, causes the pawl |5b to rotate theV ratchet H3C the distance of one tooth. Of course, the ratchet lh will be advanced through the sameangular distance but the ratchet ||3b=V will only be advanced half the distance between its teeth.

Co-operating with the ratchet H31) is a pawl i301) which is pivoted on a pin |591), the pawl |361) being provided with a tail piece |300 which is engageable with a pin |361) projecting from a lever |311) pivoted upon the pin H21). The functions of the lever i311) resembles, to some extent, the functions of the lever |31 described above but it will be noted that it is not provided with lugs corresponding to the lugs |39 and |40 described above. It will also be noted that when the handle member 461) is in the position wherein it is shown in Fig. 16, the tail end |300 of the pawl |301) is spacedfrom the pin |361) but that when the handle 4Gb-is in the position wherein it is shown in Fig. 17, the tail piece |3013 abuts against the pin |361). It will be noted further that the lever |311) in Fig. 17 is displaced from the position wherein it is shown in Fig. 16 with respect to the carriage 49D.

A spring |351) has one end fixed to the pin i361) and has its other end fixed to a pin |3|b projecting from the carriage member 521). The spring |351) tends to rotate the'lever |311) in a counter-clockwise direction (Figs. 16 and 17).

Also co-operating with the ratchet |31) is a pawl 210 which is pivoted upon the pin |591). A lug |551) projecting from a lever |561) is disposed beneath the pawl 2|0 and is engageable therewith. The lever |561) is pivoted intermediate its ends upon a pinr|51b projecting from the bracket |201). A spring |581) has one of its ends secured to the lever |561) and has the other of its ends secured to a pin |591). The spring |581) tends to displace the'lever |561) angularly in a counter-clockwise direction (Fig. 16). At its forward end, the lever |561) is provided with a lug |651). The lever |561) and the lug |001) corre spend to the lever |56 and the lug |60, respectively, described above and have substantially the same functions. It will be noted that the lug i661) is adapted to engage any one of a plurality of slots 391)provided between teeth 981) projecting from a bar 951) which is preferably identical in construction with the bar 95 described above and has the same functions. A The bar 051) is provided with a V-shaped notch 911) which corresponds to the V-shaped notch 3T described above and is engageable with the V-shaped nose 14:11) of a lever |461) which is identical in construction with the lever |46 described above and has substantially the same functions. The lever i12-61) is pivoted by a pin |451) to the lower end of the lever |311).

A leaf spring |621) fixed to the bracket |201) has its free end resting upon the lever |461) and tends to rotate that lever in a counter-clockwise direction (Fig. 16). A lever |501) is pivoted upon a pin i511) and is provided with a pin 031) at its free end. The lever |501) and the pin 831) are identical in construction with the lever |50 and the pin 83, respectively, described above and have the same functions. Thus the pin 831) may be angularly displaced in a clockwise direction (Fig. 16) until the lever |501) engages a stop pin 16510 whereupon the pin 831) will hold the forward ends of the levers |461) and |561) out of engagement with the notches or slots 911) and 991).

The bar 951) is Xed to the bed portion of a duplicating machine which is preferably identical to the corresponding bed portion of the duplicating machine illustrated in Figs. 1 to 13, inclusive, the bed portion of the machine shown in Figs. 16 and 17 being provided with a bed plate 381) and a gelatin band 351) which correspond to the bed plate 38 and the gelatin band 35 described above.

Mounted on the frame of the duplicating machine shown in Figs. 16 and 17 is a hinged bent bar 801) which is preferably identical with the bent bar 80 described above and has the same function.

The operation of the mechanism shown in Figs. 16 to 20, inclusive, is substantially as follows: Fig. 16 corresponds to Fig. 3 described above as far as the initial operation of the mechanism is concerned and Fig. 17 corresponds to Fig. 4. When the mechanism is in the condition in which it is illustrated in Fig. 16, the lug |601) engages the rst slot 991) (from the left) of the bar 951) and the nose |411) is in engagement with the notch 911). The platen roller 401) and the pressure roller 49a then have the first envelope 64 between them. A guide 631), identical with the guide 63 described above, is provided upon the carriage 491) to guide the envelopes or copy sheets to the rollers 401) and 411).

Now if it is assumed that the handle 451) is displaced to bring it into the position wherein it is shown in Fig. 17, the pawl H51) will rotate the ratchet ||3c through the distance of one tooth of the ratchet ||3c and the ratchet H31) will be displaced thesame angular distance. However, as the teeth of the ratchet |131) are spaced twice the angular distance apart that the teeth of the ratchet H3C are spaced, the teeth of the ratchet H31) shown in engagement with the paWls |301) and 210 in Fig. 20 will leave the pawls but the following teeth will not come into engagement therewith and therefore the pawls will remain in the positions wherein they are shown in Fig. 20. The direction in which the ratchets |130 and |131) are advanced during the operation of the improved mechanism is indicated by arrows in Figs. 19 and 20. When the handle 451) is in the position wherein it is shown in Fig. 17, the rollers 461) and 4 i1) are spaced from each other and the second pay envelope, or the equivalent, may be introduced between them against a margin bar (not shown) preferably identical with the margin bar described in connection with the duplicating machine illustrated in Figs. l to 13, inclusive. Then when the handle 461) is displaced to the position wherein it is shown in Fig. 16 from the position wherein it is shown in Fig. 17, the platen roller 401)` cooperates with the pressure roller 411) to apply the second pay envelope, or the equivalent, to the same data on the gelatin band 351) as was copied on the first pay envelope or the equivalent. Now when the handle 461) is returned to the position wherein it is shown in Fig. 17 so that the second pay envelope, or the equivalent, may be withdrawn from the carriage 491)', the ratchet |30 will be advanced in the direction indicated by the arrow in Fig. 19 through the distance of one tooth by the action of the lever |061) and the pawl H51). The ratchet H31) will be displaced the same angular distance and it will be noted that the teeth following the teeth engaged by the pawls |301) and 2|0 in Fig. 20 will then engage the pawls and displace them, the pawl |301) being displaced in a clockwise direction (Fig. 20) and the pawl 2|@ being displaced in a counterclockwise direction (Fig. 20). The pawl 210 is in engagement with the lug |551) and the displacement of the pawl 2|0 is accompanied by displacement of the lug |551) and the lever |561) so that the lever |561)y assumes the position wherein it is shown in Fig. 17 so that the carriage 49h may be displaced to the right (Figs. 16 and 17). However, it will be noted that the nose |4113 remains in engagement with the notch 91h and prevents displacement of the carriage to the left. The displacement of the pawl |301;l causes its tail piece |300 to engage the pin |3611 and to displace the lever |3117` in a clockwise direction (Figs. 16 and 17) with respect to the pin H26. As the lever |461) is pivoted to the lever |3717 and the lever |4619 cannot be displaced to the left (Figs. 16 and 17) as its nose |4727 is in engagement with the notch 01h, the result is that the carriage 49h is displaced to the right (Figs.A 16 and 17) a distance equal to the spacing of the teeth 98h to bring the carriage 49h approximately into the position wherein it is shown in Fig. 17. The term approximately is employed as there is a further slight movement of the ratchet Wheels ||3c and |131) caused by continued displacement of the handle 46h in a counter-clockwise direction (Fig. 17), which movement causes the pawls |3017 and 210 to fall into the positions wherein they are shown in Fig. 20 so that the cycle of operation may be begun again.

It will be apparent that the mechanism shown in Figs. 16 to 20, inclusive, operates in much the same manner as the similar mechanism shown 1n Figs. 1 to 13, inclusive, but that the mechanism in Figs. 16 to 20, inclusive, permits two impressions to be taken of each'line of data on the hectograph band before the carriage is advanced one step to make the next line of data available.

Referring now to the mechanism illustrated in Figs. 21 to 25, inclusive, wherein another embodiment of the invention is illustrated, the reference character 49d designates generally a car riage which, with the exception of some small modifications, is identical with the carriage 49.-52 described above. The carriage 4911 is mounted to reciprocate over the bed plate 3811 of a duplicating4 machine which has a frame preferably identical with the frame of the duplicating machine shown in Figs. 1 to 13, inclusive. A gelatin band 3511 is trained over the bed plate 3811. The carriage 4911 comprises carriage members 49e and 5211 which correspond to the carriage members 46 and 52 described above. Projecting from the carriage member 5211 is; a pin H211 which corresponds to the pin ||2 described above. Rotatably journalled on the pin H211 and constrained to rotate with each other, are ratchet wheels H361, ||3e and ||3. A pawl H511 cooperates with the ratchet wheel |131, a pawl |3011 co-operates with the ratchet wheel i 13e and a pawl 2 |011 co-operates with the ratchet wheel H311. lIhe pawl |3011 is provided with a tail piece |30@ which corresponds to the tail piece v|3312 of the pawl |301) described above. The pawl |3011 is pivoted on one of a plurality of bolts |5911 covered by the carriage 4911. The same bolt also pivots the pawl 2|011. The pawl ||5d is pivoted on a pin H411 which extends between and is fixed to the free ends of a part of levers Hld, only one of which is shown in Fig. 21 as the other has been omitted to illustrate the relative positions of the ratchet wheels i |311, 13e and M312 Both levers |||11 are shown in Fig. 22 and it will be noted that they are pivoted upon the pin l |211 and that the ratchet wheels H311, 3e and lif are disposed between them.

The carriage 4911 has a lever |0611 pivoted to it, the lever |0611 being identical in construction scribed above.

and having the same function as the lever |05 described above. One end of the lever |0611 is engageable by a lug |0511 projecting from a lever 4511 provided with a handle 4611. The handle 46d, the lever 4511 and the lug |0611 are identical with the handle 46, the lever 45 and the lug m6, respectively, described above and have the same functions. The lever 4511 is pivoted upon a shaft 4411 which is mounted in the carriage 46d and has the same function as the shaft 44 described above. Formed integral with the lever 4511 is a yoke 4311 carrying a platen roller 4011 which co-operates with a pressure roller M11. '111e yoke 4311, the platen roller 4011 and the pressure roller 4|c1 are identical with and have the same functions as the yoke 43, the platen l0 and the pressure roller 4|, respectively, de-

YThe carriage 4911 has a guide 6311 corresponding to the guide 63 described above.

The tail piece |3013 of the pawl |3011 is engageable with a pin |3611 projecting from a lever |3111 which'has substantially the same function as the lever |37 described above. Pivoted to the free end of the lever |3111 by a pin |4511 is a lever |4011 provided with av V-shaped nose |4111. The lever |4611 corresponds to the lever |46 described above and has substantially the same function.

The pawlr 2|011 is engageable with a lug |5511 projecting from a lever |5611 which is pivoted upon a pin |5111 projecting from a bracket |2011 which is xed to the carriage member 5211. A spring |5811 tends to rotate the lever |5611 in a counter-clockwise direction (Fig. 21). The lever |5611 is provided with a lug |6011 engageable with slots or notches 99d formed in a bar 9511 which is identical with the bar 95 described above and has the same function. It will be noted that the slots 9911 form teeth 9811 between them. The V-shaped nose |4111 of the lever |4611 is engageable with a V-shaped slot 91d formed in the bary 95d. Of course, the bar 9511 is fixed to the frame of the duplicating machine.

A spring ,|3511 tends to rotate the lever |3111 in a counter-clockwise direction (Fig. 21). A

spring H611 hasone end fixed to the bracket.

12611 and has its other end (not shown) fixed to one of the .levers H11 in the same manner as the spring I6 described above has one of its ends fixed to one of the levers The carriage 4911 is provided with a lever |5011 from which 'apin in the nose |4711 and the lug |6011 cannot engage the notches 0111 and S911. The purpose of this construction is substantially identical with the purpose of the similar construction ldescribed in connection with Figs. 1 to 13, inclusive.

The mechanism shown in Figs. 21 to 25, inclusive, is constructed so that instead of taking one impression or two impressions of each line of' data on the hectograph band, three impressions are taken of each line of data. In other wordsif it is assumed that the data is copied on envelopes 64, three envelopes may be inserted to have the data duplicated thereon before the carriage 49d advances to the next position. As the mechanism is illustrated in Fig. 21, the third impression is being taken on an envelope 6d of a line of data on the hectograph band 3511. Two previous envelopes 611 have had the data of a single line copied upon them. The operation of the mechanism during the return of the handle 15d to a substantially upright position will now be described and from it the previous operations will be readily understood, it being understood, of course, that the handle ld is moved to substantially upright position to raise the platen roller so that the second envelope 64 may be withdrawn from the carriage 49d. When the handle is moved into its upright position, the lug iliid displaces the lever lild so that it rotates the levers licd in a clockwise direction (Fig. 2l) against the action of the spring lld and through a distance equal to the spacing of the teeth on the ratchet wheel liif. It will be noted that the ratchet wheel Ilf has three times as many teeth as the ratchet wheel IlSe and the ratchet wheel |l3d so that angular displacement of the ratchet wheel liti a distance oi' one of its teeth will only displace the ratchet wheels H3@ and ild a distance equal to onethird of the distance between their teeth. However, as the third impression has been taken from a single line of data on the hectograph band 35d, it will be readily understood that the mechanisrn is arranged so that a. tooth of the ratchet wheel l ite will displace the pawl 53M and a tooth of the ratchet wheel iid will displace the pavvl Zliid. In other words, the two pawls will ride over the teeth with which they are shown in engagement in Figs. 24 and 25. During the taking of the first two impressions on the rst two envelopes, the pawls liiild and Zld simply rest in one of the spaces between the teeth of the ratchet wheel i 53e and between one of the spaces between the teeth of the ratchet Wheel Hd, respectively. However, during the return of the handle d toits upright position after the taking of the third impression, the pawls 13M and Zilld ride over the teeth of the ratchet wheels I ite and l i3d, respectively. When the pawl 2| Dd passes over a tooth of the ratchet wheel HBZ, it pushes the lug id downwardly so that the lug Iiiid is lifted from engagement with the first slot or notchr 99d from theleft (Fig. 2l) in the bar 95d. As the lug i600?, leaves the notch or slot 99d, the tail piece l3ile of the pawl l30d reaches the pin I35d and as the pawl 1301i rides over the tooth it is engaging of the ratchet Wheel il3e, the tail piece I3ile displaces th-e pin I36d and the lever i3'i'd in a clockwise direction (Fig. 2l) around the pin l|2d so that the nose Mld acting in the notch Sid will push the carriage 49d to the right (Fig. 21) a distance equal to the spacing between the notches or slots 99d whereupon the lug I d will engage the second slot 99d from the left (Fig. 21) of the bar 95d. The mechanism is then in condition to resume its cycle of operations and to make three impressions of the following line of data on the hectograph band 35d'. During the rst movement of the lever 46d from its upright position to the position wherein it is shown in Fig. 21, the nose y l 41d will engage the iirst slot 99d from the left (Fig. 2l) of the bar 95d so that it will be in position to urge the carriage to the .right (Fig.

2l) after the three impressions have been taken.

tion to claim all novelty inherent in our invention as broadly as permissible, in view of the prior art.

We claim:

l.. In a duplicating machine, a frame, a bed plate, a carriage mounted for reciprocation over said bed plate, a platen roller for pressing copy sheets against a duplicating surface disposed over said bed plate, a lever pivotally mounted in said carriage and rotatably journaliing said platen roller, said lever being adapted to be oscillated to bring said platen roller into and out of its functionally opera-tive position, a toothed member on said frame, a plurality of levers carried by said carriage and engageable with the teeth of said toothed member, and means responsive to oscillations of the first-mentioned lever and cooperating with said plurality of levers for advancing said carriage in a step by step manner over said bed plate whereby an impression is taken of only a fragmentary portion of' said duplicating sur face on one copy sheet and an impression of only another fragmentary portion of said duplicating surface is taken on another copy sheet.

2. In a duplicating machine, a frame, a bed plate, a carriage mounted for reciprocation over said bed plate, a platen roller for pressing copy sheets against a duplicating surface disposed over said bed plate, a lever pivotally mounted in said carriage and rotatably journalling said platen roller,'said lever being adapted to be oscillated to bring said platen roller into and out of its functionally operative position, a toothed member on said frame, a plurality of levers carried by said carriage and engageable with the teeth of said toothed member, and means co-operating with the first-mentioned lever and with said plurality of levers for advancing said carriage over said bed plate a predetermined distance each time the first-mentioned lever is displaced in a predetermined direction whereby an impression of only a fragmentary portion of the duplicating surface is taken on one copy sheet and an impression of only another fragmentary portion of said duplicating surface is taken on another copy sheet.

3. In a duplicating machine, a frame, a bed plate, a carriage mounted for reciprocation over said bed plate, a platen roller for pressing copy sheets against a duplicating surface disposed over said bed plate,'a lever pivotally mounted in said carriage and rotatably journalling said platen roller, said lever being adapted to be oscillated to bring said platen roller into and out of its functionally operative position, a toothed member on said frame, a plurality of levers carried by said carriage and engageable with the teeth of said toothed member, and means co-operating with the inst-mentioned lever and with said plurality of levers for advancing said carriage over said bed plate a predetermined distance each time the first-mentioned lever is displaced a plurality of times in a predetermined direction whereby only fragmentary impressions are taken on copy sheets from spaced portions of said duplicating surface, the fragmentary impressions taken on a plurality of copy sheets being identical and those taken on a plurality of succeeding copy sheets being identical with each other and different from those taken on the first-mentioned plurality of copy sheets.

4. In a duplicating machine, a frame, a bed plate, a carriage mounted for reciprocation over said bed plate, a platen roller for pressing copy sheets against a duplicating surface disposed over 

